n. A disciple of the American William Miller, who from 1833 till his death in 1849 publicly interpreted the Scriptures as fixing the second advent of Christ and the beginning of the millennium in the immediate future (at first about 1843). His followers form a still existing denomination of Adventists.n. Native nickel sulphid, a mineral having a bronze color and metallic luster, often occurring in tufts of capillary crystals, and hence called hair-pyrites, capillary pyrites.